I feed mine a varied diet; cyclopeeze, freeze dried brine shrimp, freeze dried tubifex worms, H. micro pellets, freeze dried daphnia, crushed freshwater flakes and crushed algae-based flakes. Whenever I come into the room or make a sudden movement, mine hide as well. I just have a seat in front of the tank and remain fairly still for 20-30 seconds and they come right back out. Then I add their food (sometimes even this movement makes a few dart back under cover) and sit still and watch. Mine never stay hidden long as long as I’m pretty still.